Mute Swan Welfare: Lead Poisoning and River Habitat

Mute swans are iconic UK waterbirds that face welfare challenges from lead fishing weights, power line strikes, and habitat degradation in their riverine environments.

Key Facts

Lead poisoning from discarded fishing weights was the leading cause of swan mortality in the UK until 1987
A ban on lead fishing weights under 28g has reduced but not eliminated poisoning cases
Swans ingest fishing weights when pecking at invertebrates in river sediment
Power line collisions kill hundreds of swans annually in Britain
Swan habitat quality is directly tied to aquatic plant availability and water clarity
The RSPCA and Wildlife Aid treat thousands of swans annually for trauma and poisoning

Welfare Considerations

Lead poisoning in swans causes neurological damage, weakness, and slow death over weeks. Affected birds show characteristic drooping neck, inability to fly, and progressive deterioration. Fishing-related injuries including embedded hooks, line entanglement, and lead sinker ingestion all cause welfare emergencies. Power line strikes cause acute trauma often resulting in wing fractures requiring amputation or euthanasia.

What You Can Do

Use lead-free fishing weights and remove all fishing line from waterways
Report injured swans to the RSPCA or Swan Lifeline immediately
Support campaigns for improved power line marking in areas with high swan mortality